Mały Borek (Small Forest) Nature Reserve - Nature Forest Reserve is located in the Płaska parish its area is 90.53 ha. The object of protection is the preservation of types of a pine forest with additions of spruce, characteristic to the Augustów Forest for scientific and educational reasons. In the southern part of the reserve, there are also smaller patches of marshy and alder forests, in the central part- a peat bog, overgrown with a dwarf pine swamp forest. There are mainstays and mating areas of the grouse. It has been a reserve since 2004 and is included in the Special Protection Areas for Birds - Nature 2000.
